<?php
class DingTalkClient
{
	/**@Author chaohui.zch copy from TopClient and modify 2016-12-14 **/

    /**@Author chaohui.zch modify $gatewayUrl 2017-07-18 **/
    public $gatewayUrl = "https://eco.taobao.com/router/rest";

	public $format = "xml";

	public $connectTimeout;

	public $readTimeout;

    public $apiCallType;

    public $httpMethod;

	/** 是否打开入参check**/
	public $checkRequest = true;

	protected $apiVersion = "2.0";

	protected $sdkVersion = "dingtalk-sdk-php-20161214";

    public function __construct($apiCallType = null, $httpMethod = null, $format = "xml"){
        $this->apiCallType = $apiCallType;
        $this->httpMethod = $httpMethod;
        $this->format = $format;
    }

	public function curl($url, $postFields = null)
	{
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_FAILONERROR, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		if ($this->readTimeout) {
			curl_setopt($ch, CURLOPT_TIMEOUT, $this->readTimeout);
		}
		if ($this->connectTimeout) {
			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->connectTimeout);
		}
		curl_setopt ( $ch, CURLOPT_USERAGENT, "dingtalk-sdk-php" );
		//https 请求
		if(strlen($url) > 5 && strtolower(substr($url,0,5)) == "https" ) {
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
		}

		if (is_array($postFields) && 0 < count($postFields))
		{
			$postBodyString = "";
			$postMultipart = false;
			foreach ($postFields as $k => $v)
			{
				if("@" != substr($v, 0, 1))//判断是不是文件上传
				{
					$postBodyString .= "$k=" . urlencode($v) . "&"; 
				}
				else//文件上传用multipart/form-data，否则用www-form-urlencoded
				{
					$postMultipart = true;
					if(class_exists('\CURLFile')){
						$postFields[$k] = new \CURLFile(substr($v, 1));
					}
				}
			}
			unset($k, $v);
			curl_setopt($ch, CURLOPT_POST, true);
			if ($postMultipart)
			{
				if (class_exists('\CURLFile')) {
				    curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);
				} else {
				    if (defined('CURLOPT_SAFE_UPLOAD')) {
				        curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);
				    }
				}
				curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
			}
			else
			{
				$header = array("content-type: application/x-www-form-urlencoded; charset=UTF-8");
				curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
				curl_setopt($ch, CURLOPT_POSTFIELDS, substr($postBodyString,0,-1));
			}
		}
		$reponse = curl_exec($ch);
		
		if (curl_errno($ch))
		{
			throw new Exception(curl_error($ch),0);
		}
		else
		{
			$httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			if (200 !== $httpStatusCode)
			{
				throw new Exception($reponse,$httpStatusCode);
			}
		}
		curl_close($ch);
		return $reponse;
	}

    public function curl_get($url,$apiFields = null)
    {
        $ch = curl_init();

        foreach ($apiFields as $key => $value)
        {
            if(!is_string($value)){
                $value = json_encode($value);
            }
            $url .= "&" ."$key=" . urlencode($value);
        }

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FAILONERROR, false);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);


        if ($this->readTimeout)
        {
            curl_setopt($ch, CURLOPT_TIMEOUT, $this->readTimeout);
        }

        if ($this->connectTimeout)
        {
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->connectTimeout);
        }

        curl_setopt ( $ch, CURLOPT_USERAGENT, "dingtalk-sdk-php" );

        //https ignore ssl check ?
        if(strlen($url) > 5 && strtolower(substr($url,0,5)) == "https" )
        {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }

        $reponse = curl_exec($ch);

        if (curl_errno($ch))
        {
            throw new Exception(curl_error($ch),0);
        }
        else
        {
            $httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            if (200 !== $httpStatusCode)
            {
                throw new Exception($reponse,$httpStatusCode);
            }
        }
        curl_close($ch);
        return $reponse;
    }

    public function curl_json($url, $postFields = null)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_FAILONERROR, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if ($this->readTimeout) {
            curl_setopt($ch, CURLOPT_TIMEOUT, $this->readTimeout);
        }
        if ($this->connectTimeout) {
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->connectTimeout);
        }
        curl_setopt ( $ch, CURLOPT_USERAGENT, "dingtalk-sdk-php" );
        //https 请求
        if(strlen($url) > 5 && strtolower(substr($url,0,5)) == "https" ) {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }

        if (is_array($postFields) && 0 < count($postFields))
        {
            $postBodyString = "";
            $postMultipart = false;
            foreach ($postFields as $k => $v)
            {
                if(!is_string($v)){
                    $v = json_encode($v);
                }
                if("@" != substr($v, 0, 1))//判断是不是文件上传
                {
                    $postBodyString .= "$k=" . urlencode($v) . "&";
                }
                else//文件上传用multipart/form-data，否则用www-form-urlencoded
                {
                    $postMultipart = true;
                    if(class_exists('\CURLFile')){
                        $postFields[$k] = new \CURLFile(substr($v, 1));
                    }
                }
            }
            unset($k, $v);
            curl_setopt($ch, CURLOPT_POST, true);
            if ($postMultipart)
            {
                if (class_exists('\CURLFile')) {
                    curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);
                } else {
                    if (defined('CURLOPT_SAFE_UPLOAD')) {
                        curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);
                    }
                }
                curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
            }
            else {
                $header = array("Content-Type: application/json; charset=utf-8", "Content-Length:".strlen(json_encode($postFields)));
                curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
                curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($postFields));
            }
        }
        $reponse = curl_exec($ch);

        if (curl_errno($ch))
        {
            throw new Exception(curl_error($ch),0);
        }
        else
        {
            $httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            if (200 !== $httpStatusCode)
            {
                throw new Exception($reponse,$httpStatusCode);
            }
        }
        curl_close($ch);
        return $reponse;
    }

	public function curl_with_memory_file($url, $postFields = null, $fileFields = null)
	{
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_FAILONERROR, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		if ($this->readTimeout) {
			curl_setopt($ch, CURLOPT_TIMEOUT, $this->readTimeout);
		}
		if ($this->connectTimeout) {
			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->connectTimeout);
		}
		curl_setopt ( $ch, CURLOPT_USERAGENT, "dingtalk-sdk-php" );
		//https 请求
		if(strlen($url) > 5 && strtolower(substr($url,0,5)) == "https" ) {
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
		}
		//生成分隔符
		$delimiter = '-------------' . uniqid();
		//先将post的普通数据生成主体字符串
		$data = '';
		if($postFields != null){
			foreach ($postFields as $name => $content) {
			    $data .= "--" . $delimiter . "\r\n";
			    $data .= 'Content-Disposition: form-data; name="' . $name . '"';
			    //multipart/form-data 不需要urlencode，参见 http:stackoverflow.com/questions/6603928/should-i-url-encode-post-data
			    $data .= "\r\n\r\n" . $content . "\r\n";
			}
			unset($name,$content);
		}

		//将上传的文件生成主体字符串
		if($fileFields != null){
			foreach ($fileFields as $name => $file) {
			    $data .= "--" . $delimiter . "\r\n";
			    $data .= 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $file['filename'] . "\" \r\n";
			    $data .= 'Content-Type: ' . $file['type'] . "\r\n\r\n";//多了个文档类型

			    $data .= $file['content'] . "\r\n";
			}
			unset($name,$file);
		}
		//主体结束的分隔符
		$data .= "--" . $delimiter . "--";

		curl_setopt($ch, CURLOPT_POST, true);
		curl_setopt($ch, CURLOPT_HTTPHEADER , array(
		    'Content-Type: multipart/form-data; boundary=' . $delimiter,
		    'Content-Length: ' . strlen($data))
		); 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

		$reponse = curl_exec($ch);
		unset($data);

		if (curl_errno($ch))
		{
			throw new Exception(curl_error($ch),0);
		}
		else
		{
			$httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			if (200 !== $httpStatusCode)
			{
				throw new Exception($reponse,$httpStatusCode);
			}
		}
		curl_close($ch);
		return $reponse;
	}

	protected function logCommunicationError($apiName, $requestUrl, $errorCode, $responseTxt)
	{
		$localIp = isset($_SERVER["SERVER_ADDR"]) ? $_SERVER["SERVER_ADDR"] : "CLI";
		$logger = new TopLogger;
		$logger->conf["log_file"] = rtrim(TOP_SDK_WORK_DIR, '\\/') . '/' . "logs/top_comm_err_" . "_" . date("Y-m-d") . ".log";
		$logger->conf["separator"] = "^_^";
		$logData = array(
		date("Y-m-d H:i:s"),
		$apiName,
		$localIp,
		PHP_OS,
		$this->sdkVersion,
		$requestUrl,
		$errorCode,
		str_replace("\n","",$responseTxt)
		);
		$logger->log($logData);
	}

    public function execute($request, $session = null,$bestUrl = null){
        if(DingTalkConstant::$CALL_TYPE_OAPI == $this->apiCallType){
            return $this->_executeOapi($request, $session, $bestUrl, null, null, null, null);
        }else{
            return $this->_execute($request, $session, $bestUrl);
        }
    }

    public function executeWithAccessKey($request, $bestUrl = null, $accessKey, $accessSecret){
        return $this->executeWithCorpId($request, $bestUrl, $accessKey, $accessSecret, null, null);
    }

    public function executeWithSuiteTicket($request,$bestUrl = null, $accessKey, $accessSecret, $suiteTicket){
        return $this->executeWithCorpId($request,$bestUrl, $accessKey, $accessSecret, $suiteTicket, null);
    }

	public function executeWithCorpId($request, $bestUrl = null, $accessKey, $accessSecret, $suiteTicket, $corpId) {
        if(DingTalkConstant::$CALL_TYPE_OAPI == $this->apiCallType){
            return $this->_executeOapi($request, null, $bestUrl,$accessKey, $accessSecret, $suiteTicket, $corpId);
        }else{
            return $this->_execute($request, null, $bestUrl);
        }
    }

    private function _executeOapi($request, $session = null,$bestUrl = null,$accessKey, $accessSecret, $suiteTicket, $corpId){
        $result =  new ResultSet();
        if($this->checkRequest) {
            try {
                $request->check();
            } catch (Exception $e) {

                $result->code = $e->getCode();
                $result->msg = $e->getMessage();
                return $result;
            }
        }

        $sysParams["method"] = $request->getApiMethodName();
        //系统参数放入GET请求串
        if($bestUrl){
            if(strpos($bestUrl,'?') === false){
                $requestUrl = $bestUrl."?";
            }else{
                $requestUrl = $bestUrl;
            }
        }else{
            $requestUrl = $this->gatewayUrl."?";
        }
        if(null != $accessKey){
            $timestamp = $this->getMillisecond();
            // 验证签名有效性
            $canonicalString = $this->getCanonicalStringForIsv($timestamp, $suiteTicket);
            $signature = $this->computeSignature($accessSecret, $canonicalString);

            $queryParams["accessKey"] = $accessKey;
            $queryParams["signature"] = $signature;
            $queryParams["timestamp"] = $timestamp+"";
            if($suiteTicket != null) {
                $queryParams["suiteTicket"] = $suiteTicket;
            }
            if($corpId != null){
                $queryParams["corpId"] =  $corpId;
            }
            foreach ($queryParams as $queryParamKey => $queryParamValue) {
                $requestUrl .= "$queryParamKey=" . urlencode($queryParamValue) . "&";
            }
        }else{
            $requestUrl .= "access_token=" . urlencode($session) . "&";
        }

        $apiParams = array();
        //获取业务参数
        $apiParams = $request->getApiParas();
        $fileFields = array();
        foreach ($apiParams as $key => $value) {
            if(is_array($value) && array_key_exists('type',$value) && array_key_exists('content',$value) ){
                $value['name'] = $key;
                $fileFields[$key] = $value;
                unset($apiParams[$key]);
            }
        }

        // $requestUrl .= "timestamp=" . urlencode($sysParams["timestamp"]) . "&";
        $requestUrl = substr($requestUrl, 0, -1);

        //发起HTTP请求
        try
        {
            if(count($fileFields) > 0){
                $resp = $this->curl_with_memory_file($requestUrl, $apiParams, $fileFields);
            }else{
                if(DingTalkConstant::$METHOD_POST == $this->httpMethod){
                    $resp = $this->curl_json($requestUrl, $apiParams);
                }else{
                    $resp = $this->curl_get($requestUrl, $apiParams);
                }
            }
        }
        catch (Exception $e)
        {
            $this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_ERROR_" . $e->getCode(),$e->getMessage());
            $result->code = $e->getCode();
            $result->msg = $e->getMessage();
            return $result;
        }

        unset($apiParams);
        unset($fileFields);
        //解析TOP返回结果
        $respWellFormed = false;
        if ("json" == $this->format)
        {
            $respObject = json_decode($resp);
            if (null !== $respObject)
            {
                $respWellFormed = true;
            }
        }
        else if("xml" == $this->format)
        {
            $respObject = @simplexml_load_string($resp);
            if (false !== $respObject)
            {
                $respWellFormed = true;
            }
        }

        //返回的HTTP文本不是标准JSON或者XML，记下错误日志
        if (false === $respWellFormed)
        {
            $this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_RESPONSE_NOT_WELL_FORMED",$resp);
            $result->code = 0;
            $result->msg = "HTTP_RESPONSE_NOT_WELL_FORMED";
            return $result;
        }

        //如果TOP返回了错误码，记录到业务错误日志中
        if (isset($respObject->code))
        {
            $logger = new TopLogger;
            $logger->conf["log_file"] = rtrim(TOP_SDK_WORK_DIR, '\\/') . '/' . "logs/top_biz_err_" .  "_" . date("Y-m-d") . ".log";
            $logger->log(array(
                date("Y-m-d H:i:s"),
                $resp
            ));
        }
        return $respObject;
    }

    private function getMillisecond() {
        list($s1, $s2) = explode(' ', microtime());
        return (float)sprintf('%.0f', (floatval($s1) + floatval($s2)) * 1000);
    }

    private function getCanonicalStringForIsv($timestamp, $suiteTicket) {
        $result = $timestamp;
        if($suiteTicket != null) {
            $result .= "\n".$suiteTicket;
        }
        return $result;
    }

    private function computeSignature($accessSecret, $canonicalString){
        $s = hash_hmac('sha256', $canonicalString, $accessSecret, true);
        return base64_encode($s);
    }

    private function _execute($request, $session = null,$bestUrl = null)
	{
		$result =  new ResultSet(); 
		if($this->checkRequest) {
			try {
				$request->check();
			} catch (Exception $e) {

				$result->code = $e->getCode();
				$result->msg = $e->getMessage();
				return $result;
			}
		}
		//组装系统参数
		$sysParams["v"] = $this->apiVersion;
		$sysParams["format"] = $this->format;
		$sysParams["method"] = $request->getApiMethodName();
		$sysParams["timestamp"] = date("Y-m-d H:i:s");
		if (null != $session)
		{
			$sysParams["session"] = $session;
		}
		$apiParams = array();
		//获取业务参数
		$apiParams = $request->getApiParas();


		//系统参数放入GET请求串
		if($bestUrl){
            if(strpos($bestUrl,'?') === false){
                $requestUrl = $bestUrl."?";
            }else{
                $requestUrl = $bestUrl;
            }
			$sysParams["partner_id"] = $this->getClusterTag();
		}else{
			$requestUrl = $this->gatewayUrl."?";
			$sysParams["partner_id"] = $this->sdkVersion;
		}

		foreach ($sysParams as $sysParamKey => $sysParamValue)
		{
			// if(strcmp($sysParamKey,"timestamp") != 0)
			$requestUrl .= "$sysParamKey=" . urlencode($sysParamValue) . "&";
		}

		$fileFields = array();
		foreach ($apiParams as $key => $value) {
			if(is_array($value) && array_key_exists('type',$value) && array_key_exists('content',$value) ){
				$value['name'] = $key;
				$fileFields[$key] = $value;
				unset($apiParams[$key]);
			}
		}

		// $requestUrl .= "timestamp=" . urlencode($sysParams["timestamp"]) . "&";
		$requestUrl = substr($requestUrl, 0, -1);

		//发起HTTP请求
		try
		{
			if(count($fileFields) > 0){
				$resp = $this->curl_with_memory_file($requestUrl, $apiParams, $fileFields);
			}else{
				$resp = $this->curl($requestUrl, $apiParams);
			}
		}
		catch (Exception $e)
		{
			$this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_ERROR_" . $e->getCode(),$e->getMessage());
			$result->code = $e->getCode();
			$result->msg = $e->getMessage();
			return $result;
		}

		unset($apiParams);
		unset($fileFields);
		//解析TOP返回结果
		$respWellFormed = false;
		if ("json" == $this->format)
		{
			$respObject = json_decode($resp);
			if (null !== $respObject)
			{
				$respWellFormed = true;
				foreach ($respObject as $propKey => $propValue)
				{
					$respObject = $propValue;
				}
			}
		}
		else if("xml" == $this->format)
		{
			$respObject = @simplexml_load_string($resp);
			if (false !== $respObject)
			{
				$respWellFormed = true;
			}
		}

		//返回的HTTP文本不是标准JSON或者XML，记下错误日志
		if (false === $respWellFormed)
		{
			$this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_RESPONSE_NOT_WELL_FORMED",$resp);
			$result->code = 0;
			$result->msg = "HTTP_RESPONSE_NOT_WELL_FORMED";
			return $result;
		}

		//如果TOP返回了错误码，记录到业务错误日志中
		if (isset($respObject->code))
		{
			$logger = new TopLogger;
			$logger->conf["log_file"] = rtrim(TOP_SDK_WORK_DIR, '\\/') . '/' . "logs/top_biz_err_" .  "_" . date("Y-m-d") . ".log";
			$logger->log(array(
				date("Y-m-d H:i:s"),
				$resp
			));
		}
		return $respObject;
	}

	public function exec($paramsArray)
	{
		if (!isset($paramsArray["method"]))
		{
			trigger_error("No api name passed");
		}
		$inflector = new LtInflector;
		$inflector->conf["separator"] = ".";
		$requestClassName = ucfirst($inflector->camelize(substr($paramsArray["method"], 7))) . "Request";
		if (!class_exists($requestClassName))
		{
			trigger_error("No such dingtalk-api: " . $paramsArray["method"]);
		}

		$session = isset($paramsArray["session"]) ? $paramsArray["session"] : null;

		$req = new $requestClassName;
		foreach($paramsArray as $paraKey => $paraValue)
		{
			$inflector->conf["separator"] = "_";
			$setterMethodName = $inflector->camelize($paraKey);
			$inflector->conf["separator"] = ".";
			$setterMethodName = "set" . $inflector->camelize($setterMethodName);
			if (method_exists($req, $setterMethodName))
			{
				$req->$setterMethodName($paraValue);
			}
		}
		return $this->execute($req, $session);
	}

	private function getClusterTag()
    {
	    return substr($this->sdkVersion,0,11)."-cluster".substr($this->sdkVersion,11);
    }
}
